How can you allow CORS in Express.js?

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How can you allow CORS in Express.js?

CORS is a node.js package for providing a Connect/Express middleware that can be used to enable CORS with various options.

$ npm install cors
var express = require('express')
var cors = require('cors')
var app = express()


app.get('/products/:id', function (req, res, next) {
  res.json({msg: 'This is CORS-enabled for all origins!'})

app.listen(80, function () {
  console.log('CORS-enabled web server listening on port 80')


Express Cors Middleware.